N.М. Ivanov1

1 JSC «All-Russian Scientific Research Institute «Gradient» (Rostov-on-Don, Russia)

1 qkivanov@list.ru

The paper considers the issues of detection, spatial localization, and isolation of individual radio signals from their additive mixture received by the elements of an antenna array with digital signal processing. To solve the above issues, the method of non-quadratic regularization is applied in the signal model, which takes into account signal delays on the antenna array elements to a first approximation. Using the Lagrange multiplier method, the adaptive estimates of signals were obtained and a direction finding function was constructed. The function maxima are identified with the directions to the radiation sources. An effective method for iterative solution of the problem in Lp space for any p values is proposed. The simulation results are set out for p = 1, demonstrating the possibility of detecting and estimating the parameters of weak signals. The signal level does not exceed the noise and interference level against the background of interfering intense radiation sources. The proposed method can significantly increase the effectiveness of solving problems of detecting and direction finding signals from stationary objects and tracking mobile objects both in the traditional single-site radio monitoring systems and passive location radio systems.

Ivanov N.М. The application of the non-quadratic regularization method for direction finding and adaptive signal processing. Radioengineering. 2024. V. 88. № 11. P. 13−19. DOI: https://doi.org/10.18127/j00338486-202411-03 (in Russian)

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